using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using Microsoft.AspNetCore.Mvc.Rendering;
using EveryThing.Data;
using EveryThing.Models;
using EveryThing.Models.Project;
using Microsoft.AspNetCore.Http;
using System.IO;
using Microsoft.AspNetCore.Hosting;

namespace EveryThing.Pages.Projects
{
    [Authorize(Roles = "Administrator,ProjecThingUser")]
    public class CreatePartItemUploadExcelModel : PageModel
    {
        private readonly IWebHostEnvironment _hostingEnvironment;
        private readonly ApplicationDbContext _context;
        private readonly UserManager<IdentityApplicationUser> _userManager;
        private readonly SignInManager<IdentityApplicationUser> _loginManager;
        private readonly RoleManager<IdentityApplicationRole> _roleManager;

        public CreatePartItemUploadExcelModel(ApplicationDbContext context, UserManager<IdentityApplicationUser> userManager, SignInManager<IdentityApplicationUser> loginManager, RoleManager<IdentityApplicationRole> roleManager, IWebHostEnvironment environment)
        {
            _context = context;
            _userManager = userManager;
            _loginManager = loginManager;
            _roleManager = roleManager;
            _hostingEnvironment = environment;
        }


        [BindProperty]
        public IFormFile File { get; set; }
        [BindProperty]
        public int IdProject { get; set; }
        [BindProperty]
        public int IdProjectPart { get; set; }


        public IActionResult OnGet(int idProject, int idProjectPart)
        {
            var user = _userManager.GetUserAsync(User).Result;

            IdProject = idProject;
            IdProjectPart = idProjectPart;


            return Page();
        }

        //public async Task<IActionResult> OnPostAsync()
        //{
        //    if (!ModelState.IsValid)
        //    {
        //        return Page();
        //    }
        //    string uploads = Path.Combine(_hostingEnvironment.WebRootPath, "uploads");

        //    if (File.Length > 0)
        //    {
        //        string filePath = Path.Combine(uploads, File.FileName);
        //        using (Stream fileStream = new FileStream(filePath, FileMode.Create))
        //        {
        //            await File.CopyToAsync(fileStream);
        //        }
        //    }

        //    return RedirectToPage("./Edit");
        //}

        //public async Task<IActionResult> OnPostUploadAsync(List<IFormFile> files)
        //{
        //    long size = files.Sum(f => f.Length);

        //    foreach (var formFile in files)
        //    {
        //        if (formFile.Length > 0)
        //        {
        //            var filePath = Path.GetTempFileName();
        //            System.Diagnostics.Debug.WriteLine(filePath);
        //            using (var stream = System.IO.File.Create(filePath))
        //            {
        //                await formFile.CopyToAsync(stream);
        //            }
        //        }
        //    }

        //    // Process uploaded files
        //    // Don't rely on or trust the FileName property without validation.

        //    return RedirectToPage("./Edit");
        //}

        public async Task<IActionResult> OnPostUpload(int idProject, int idProjectPart, List<IFormFile> postedFiles)
        {
            if (postedFiles == null 
                || postedFiles.Count != 1)
            {
                return Page();//TODO return error
            }
            string path = Path.Combine(_hostingEnvironment.WebRootPath, "Uploads");
            if (!Directory.Exists(path))
            {
                Directory.CreateDirectory(path);
            }

            List<string> uploadedFiles = new List<string>();

            var postedFile = postedFiles[0];

            string fileName = Guid.NewGuid().ToString().Replace("-", "_") + Path.GetExtension(postedFile.FileName);
            using (FileStream stream = new FileStream(Path.Combine(path, fileName), FileMode.Create))
            {
                postedFile.CopyTo(stream);
                uploadedFiles.Add(fileName);
            }
            return RedirectToPage("./CreatePartItemImportExcel", new { idProject = idProject, idProjectPart = idProjectPart, fileName = fileName});
        }
    }
}